CVE-2026-82524 unopim CVE debrief

Who should care

System administrators and security teams responsible for UnoPim installations should assess exposure and prioritize remediation. They should review UnoPim versions, verify exposure, and implement compensating controls for exposed systems. Security teams should also monitor for suspicious activity related to PHP file uploads and review server logs for indicators of compromise.

Why it matters

CVE-2026-82524 is a high-severity vulnerability in UnoPim that allows authenticated administrators to upload arbitrary PHP files. Defenders should assess exposure, prioritize remediation, and verify UnoPim version and exposure.

• Potential for arbitrary PHP file uploads and execution
• Possible elevation of privileges for authenticated administrators
• Risk of remote code execution on the server
• Need for verification of UnoPim version and exposure

Technical summary

CVE-2026-82524 is an authenticated file upload vulnerability in UnoPim before 2.1.5. The vulnerability exists in the TinyMCE image upload endpoint due to missing file extension and MIME type validation, allowing administrators to upload arbitrary PHP files. This can lead to remote code execution on the server and elevation of privileges for authenticated administrators. Defenders should assess exposure, prioritize remediation, and verify UnoPim version and exposure to prevent potential attacks. UnoPim version 2.1.5 or later mitigates this vulnerability.

Defensive priority

High

Recommended defensive actions

• Review and update UnoPim installations to version 2.1.5 or later
• Restrict access to the TinyMCE image upload endpoint
• Implement additional validation for file uploads
• Monitor for suspicious activity related to PHP file uploads
• Perform vulnerability scanning to identify exposed UnoPim installations
• Review server logs for indicators of compromise related to PHP file uploads
• Verify that compensating controls are in place for exposed systems

Evidence notes

The CVE record and NVD entry provide details on the authenticated file upload vulnerability in UnoPim before 2.1.5, which allows administrators to upload arbitrary PHP files. The vulnerability is due to missing file extension and MIME type validation in the TinyMCE image upload endpoint. Evidence is limited to CVE and NVD entries; defenders should verify UnoPim version and exposure.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.